CN113999944A - Preparation method of fabric containing antibacterial cow leather - Google Patents
Preparation method of fabric containing antibacterial cow leather Download PDFInfo
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- CN113999944A CN113999944A CN202111286305.XA CN202111286305A CN113999944A CN 113999944 A CN113999944 A CN 113999944A CN 202111286305 A CN202111286305 A CN 202111286305A CN 113999944 A CN113999944 A CN 113999944A
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- cowhide
- leather
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C13/00—Manufacture of special kinds or leather, e.g. vellum
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
- C14C1/04—Soaking
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention relates to the technical field of leather production, in particular to a preparation method of a fabric containing antibacterial cow leather, which comprises the following steps: (1) recovering the cowhide, and recovering regenerated cowhide; (2) crushing, namely crushing the recycled regenerated cowhide into particles; (3) soaking in water, and rotating the drum in an alkaline solution to ensure that the cowhide fully absorbs water, thereby laying a good foundation for subsequent chemical material permeation; (4) degreasing and washing, namely degreasing the soaked cowhide to remove fat in the cowhide; (5) softening, namely putting the degreased and washed cowhide in an acid solution to corrode the leather to a certain extent, so that the softening effect can be improved, and then adding animal and vegetable oil to make the leather softer; (6) tanning, adding a small amount of water and antibacterial particles, uniformly mixing, then pressing into blocks, and tanning by using a tanning agent to ensure that the blocks have a long-time antibacterial and mite-removing effect; (7) and (3) printing the leather, namely making the tanned leather into the required fabric according to the requirement.
Description
Technical Field
The invention relates to the technical field of leather production, in particular to a preparation method of a fabric containing antibacterial cow leather.
Background
The leather is animal skin which is obtained by physical and chemical processing such as unhairing, tanning and the like and is denatured and non-perishable. The leather is formed by tightly weaving natural protein fibers in a three-dimensional space, the surface of the leather is provided with a special grain surface layer, the leather has natural grains and luster, the hand feeling is comfortable, and various kinds of leather, such as cow leather.
However, the existing cow leather often does not have the antibacterial effect or has poor antibacterial effect, so that bacteria and mites are easy to breed on the fabric when the cow leather is used for a long time, and a lot of troubles are brought to users.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a preparation method of a fabric containing antibacterial cow leather, which is convenient for uniform tanning and has an antibacterial and mite-killing effect.
The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of a fabric containing antibacterial cow leather comprises the following steps
(1) Recovery of cow hide
Separating and recovering the regenerated cowhide, and using the recovered regenerated cowhide for manufacturing new leather; the regenerated cowhide is recycled, so that resource waste is avoided, and environmental pollution is avoided.
(2) Breaking by crushing
Crushing the recycled regenerated cowhide into particles, and preliminarily removing solid wastes and sediments on the surface of the cowhide; the regenerated cowhide is smashed into particles which can fully contact and react with the solution in the subsequent process, and meanwhile, the smashed particles are convenient for cleaning the pollutants on the surface of the regenerated cowhide.
(3) Soaking in water
Placing a plurality of blocky regenerated cowhides in a soaking solution with the pH value of 10-11, 0.3% -0.5% of bactericide and 0.25% -0.35% of penetrating agent, rotating the blocky regenerated cowhides in the soaking solution for 4-8 hours, and discharging liquid;
(4) degreasing and water washing
Putting the soaked cowhide into a solution containing lipase, controlling the temperature at 40-50 ℃ and the pH value at 10-11, rotating the cowhide for 20-40 minutes, and discharging liquid; the lipase is insoluble in alkaline solution, and fat in the cow skin is removed by dissolving the lipase.
(5) Softening
Placing the cowhide obtained after degreasing and washing in an acid solution with the pH value of 4-5 for a drum for 20-30 minutes, corroding the surface of the cowhide to change the pH value of the cowhide to 7, adding one or more of vegetable oil, animal oil and grease extraction products, continuing to rotate the drum for 20-30 minutes, discharging liquid to make the leather softer and reduce the hygroscopicity.
(6) Tanning
Adding a small amount of water into softened cowhide, slightly wetting the cowhide, adding an antibacterial agent, mixing the antibacterial agent with cowhide particles, making the granular cowhide into blocks by a calender, placing the blocky cowhide into a tanning agent solution with the mass ratio of 15-25:1, adding the antibacterial agent, rotating the blocky cowhide in a drum for 30-40 minutes, and performing neutralization, retanning and drying treatment for several times; the antibacterial agent is granular, so that the cow leather is more uniform and sufficient in tanning, and a small amount of water can be used for avoiding water from melting antibacterial particles, so that cow leather fibers are more uniform and sufficient in mixing with the particles, and can also be used for avoiding the cow leather fibers from being too dry and breaking in mixing, so that the performance of the cow leather is influenced, and further the cow leather can realize long-time antibacterial mite removal, and the tanned cow leather is soft and full, has a delicate leather surface and has good physical and mechanical properties.
(7) Leather printing
The tanned leather is shaved, dyed and screen printed according to the requirement, and the printing ink or the color paste is extruded by a screen printing plate through a scraper, so that the pattern printed by the printing ink can be displayed on the surface of the leather.
Preferably, the area of the granular regenerated cowhide in the step (2) is 5-20cm2The size is suitable.
Preferably, the mass ratio of the soaking solution to the cowhide in the step (3) is 20-30:1, the substance for adjusting the pH value of the solution is one or more of sodium carbonate, sodium hydroxide or hydrated lime, and the penetrating agent is one or more of sodium alkyl benzene sulfonate, sodium alkyl sulfate, secondary sodium alkyl sulfonate, secondary sodium alkyl sulfate, sodium alkyl naphthalene sulfonate and sodium alkyl sulfosuccinate.
Preferably, the substance for adjusting the PH value in step (4) is one or more of sodium carbonate or sodium acetate.
Preferably, the tanning agent in the step (6) is one or more of basic chromium salt, basic aluminum salt and formaldehyde.
Preferably, the antibacterial agent in step (6) is in solid particulate form.
Preferably, the thickness of the shaved beef leather in the step (7) is less than 2 mm, and the leather content in the beef leather is 75%.
The invention has the beneficial effects that:
(1) according to the preparation method of the fabric containing the antibacterial cow leather, the regenerated cow leather is smashed into the particles and can fully contact and react with a solution in the subsequent process, and pollutants on the surface of the regenerated cow leather can be conveniently cleaned in the process of smashing into the particles.
(2) According to the preparation method of the fabric containing the antibacterial cow leather, a small amount of water is added before tanning, so that cow leather fibers can be more uniformly and fully mixed with particles, the cow leather fibers can be prevented from being too dry and being broken during mixing, cow leather can be more uniformly and fully tanned and rolled into blocks, and meanwhile, long-time antibacterial mite removal can be realized in the cow leather, and the tanned cow leather is soft and plump in leather surface and fine in leather surface and has good physical and mechanical properties.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The preparation method of the fabric containing the antibacterial cow leather comprises the following steps
(1) Recovery of cow hide
Separating and recovering 1000cm2The recycled regenerated cowhide is used for manufacturing new leather after being recycled; the regenerated cow leather is recycled, so that the resource waste is avoided, and the method is the same as the method for recycling the regenerated cow leatherAnd the environment pollution is avoided.
(2) Breaking by crushing
Crushing the recycled regenerated cowhide into several 10cm pieces2The solid wastes and sediments on the surface of the cowhide are primarily removed in a block shape with large area; the regenerated cowhide can be fully contacted and reacted with the solution after being smashed into blocks, and the pollutants on the surface of the regenerated cowhide can be conveniently cleaned in the process of smashing into blocks.
(3) Soaking in water
Placing a plurality of blocky regenerated cowhides in a soaking solution of a bactericide with the pH value of 10 and 0.3% and a penetrating agent with the pH value of 0.25% for rotating a drum for 5 hours, and discharging liquid; in the solution with high PH value, the regenerated cow leather can be well filled with water, the pollution can be reduced, and the waste liquid degradation is good.
(4) Degreasing and water washing
Putting the soaked cowhide into a solution containing lipase, controlling the temperature at 45 ℃ and the pH value at 10, rotating the cowhide for 20 minutes, and discharging liquid; the lipase is insoluble in alkaline solution, and fat in the cow skin is removed by lipase dissolution, and the formed fatty acid is free in water or combined into soap salt, so that the fat can be rapidly removed from the cow skin.
(5) Softening
The ox leather that obtains after will degrease washing is placed in pH value and is 4 oxalic acid nature solution in the rotary drum 20 minutes, corrodes its surface after, makes the pH value of ox leather become 7, need let acidic material corrode the leather to a certain extent before the softening, can improve the softening effect, adds castor oil, continues the rotary drum 20 minutes, and the flowing back makes the leather softer, reduces the hygroscopicity.
(6) Tanning
Adding a small amount of water into the softened cowhide to slightly wet the cowhide, then adding an antibacterial agent, mixing the antibacterial agent with cowhide particles, then making the granular cowhide into blocks by a calender, then placing the blocky cowhide into a chrome tanning agent solution with the mass ratio of 20:1, adding the antibacterial agent, rotating the blocky cowhide in a drum for 30 minutes, and carrying out neutralization, retanning and drying treatment for a plurality of times; the antibacterial agent is granular, so that the cow leather is more uniform and sufficient in tanning, and a small amount of water can be used for avoiding water from melting antibacterial particles, so that cow leather fibers are more uniform and sufficient in mixing with the particles, and can also be used for avoiding the cow leather fibers from being too dry and breaking in mixing, so that the performance of the cow leather is influenced, and further the cow leather can realize long-time antibacterial mite removal, and the tanned cow leather is soft and full, has a delicate leather surface and has good physical and mechanical properties.
(7) Leather printing
The tanned leather is shaved, dyed and screen printed according to the requirement to prepare the cow leather with the thickness of 1.8mm, and the printing ink or the color paste is extruded by a screen plate through a scraper to be printed on the leather, so that the pattern printed by the printing ink can be displayed on the surface of the leather.
Example two
(1) Recovery of cow hide
Separating and recovering 1000cm2The recycled regenerated cowhide is used for manufacturing new leather after being recycled; the regenerated cowhide is recycled, so that resource waste is avoided, and environmental pollution is avoided.
(2) Breaking by crushing
Crushing the recycled regenerated cowhide into several 10cm pieces2The solid wastes and sediments on the surface of the cowhide are primarily removed in a block shape with large area; the regenerated cowhide can be fully contacted and reacted with the solution after being smashed into blocks, and the pollutants on the surface of the regenerated cowhide can be conveniently cleaned in the process of smashing into blocks.
(3) Soaking in water
Placing a plurality of blocky regenerated cowhides in a soaking solution of a bactericide with the pH value of 11 and 0.3% and a penetrating agent with the pH value of 0.25% for rotating a drum for 6 hours, and discharging liquid; in the solution with high PH value, the regenerated cow leather can be well filled with water, the pollution can be reduced, and the waste liquid degradation is good.
(4) Degreasing and water washing
Putting the soaked cowhide into a solution containing lipase, controlling the temperature at 40 ℃ and the pH value at 11, rotating the cowhide for 30 minutes, and discharging liquid; the lipase is insoluble in alkaline solution, and fat in the cow skin is removed by lipase dissolution, and the formed fatty acid is free in water or combined into soap salt, so that the fat can be rapidly removed from the cow skin.
(5) Softening
The cowhide obtained after degreasing and washing is placed in oxalic acid solution with the pH value of 5 to be subjected to drum rotation for 30 minutes, the surface of the cowhide is corroded, the pH value of the cowhide is changed to 7, acidic substances are required to corrode the leather to a certain extent before softening, the softening effect can be improved, beef tallow is added, the drum rotation is continued for 30 minutes, liquid is discharged, the leather is softer, and the hygroscopicity is reduced.
(6) Tanning
Adding a small amount of water into the softened cowhide to slightly wet the cowhide, then adding an antibacterial agent, mixing the antibacterial agent with cowhide particles, then making the granular cowhide into blocks by a calender, then placing the blocky cowhide into a chrome tanning agent solution with the mass ratio of 20:1, adding the antibacterial agent, rotating the blocky cowhide in a drum for 40 minutes, and carrying out neutralization, retanning and drying treatment for a plurality of times; the antibacterial agent is granular, so that the cow leather is more uniform and sufficient in tanning, and a small amount of water can be used for avoiding water from melting antibacterial particles, so that cow leather fibers are more uniform and sufficient in mixing with the particles, and can also be used for avoiding the cow leather fibers from being too dry and breaking in mixing, so that the performance of the cow leather is influenced, and further the cow leather can realize long-time antibacterial mite removal, and the tanned cow leather is soft and full, has a delicate leather surface and has good physical and mechanical properties.
(7) Leather printing
The tanned leather is shaved, dyed and screen printed according to the requirement to prepare the cow leather with the thickness of 1.5mm, and the printing ink or the color paste is extruded by a screen plate through a scraper to be printed on the leather, so that the pattern printed by the printing ink can be displayed on the surface of the leather.
EXAMPLE III
Comparative experiment
(1) Recovery of cow hide
Separating and recovering 1000cm2The recycled regenerated cowhide is used for manufacturing new leather after being recycled; the regenerated cowhide is recycled, so that resource waste is avoided, and environmental pollution is avoided.
(2) Removing impurities
Removing solid waste and sediment on the surface of the recycled regenerated cow leather.
(3) Soaking in water
Placing a plurality of blocky regenerated cowhides in a soaking solution of a bactericide with the pH value of 10 and 0.3% and a penetrating agent with the pH value of 0.25% for rotating a drum for 5 hours, and discharging liquid; in the solution with high PH value, the regenerated cow leather can be well filled with water, the pollution can be reduced, and the waste liquid degradation is good.
(4) Degreasing and water washing
Putting the soaked cowhide into a solution containing lipase, controlling the temperature at 45 ℃ and the pH value at 10, rotating the cowhide for 20 minutes, and discharging liquid; the lipase is insoluble in alkaline solution, and fat in the cow skin is removed by lipase dissolution, and the formed fatty acid is free in water or combined into soap salt, so that the fat can be rapidly removed from the cow skin.
(5) Softening
The ox leather that obtains after will degrease washing is placed in pH value and is 4 oxalic acid nature solution in the rotary drum 20 minutes, corrodes its surface after, makes the pH value of ox leather become 7, need let acidic material corrode the leather to a certain extent before the softening, can improve the softening effect, adds castor oil, continues the rotary drum 20 minutes, and the flowing back makes the leather softer, reduces the hygroscopicity.
(6) Tanning
Adding a small amount of water into the softened cowhide to slightly wet the cowhide, then adding an antibacterial agent, mixing the antibacterial agent with cowhide particles, then making the granular cowhide into blocks by a calender, then placing the blocky cowhide into a tanning agent solution with the mass ratio of 20:1, adding the antibacterial agent, rotating the blocky cowhide in a drum for 30 minutes, and performing neutralization, retanning and drying treatment for a plurality of times; the antibacterial agent is granular, so that the cow leather is more uniform and sufficient in tanning, and a small amount of water can be used for avoiding water from melting antibacterial particles, so that cow leather fibers are more uniform and sufficient in mixing with the particles, and can also be used for avoiding the cow leather fibers from being too dry and breaking in mixing, so that the performance of the cow leather is influenced, and further the cow leather can realize long-time antibacterial mite removal, and the tanned cow leather is soft and full, has a delicate leather surface and has good physical and mechanical properties.
(7) Leather printing
The tanned leather is shaved, dyed and screen printed according to the requirement to prepare the cow leather with the thickness of 1.8mm, and the printing ink or the color paste is extruded by a screen plate through a scraper to be printed on the leather, so that the pattern printed by the printing ink can be displayed on the surface of the leather.
Comparison of the examples of the invention with common cowhide
As can be seen from the data in the table, by using the leather processing technology in the first embodiment of the invention, compared with the cow leather prepared from other embodiments and common cow leather, the softness is high, compared with 100 cow leather, the softness of the cow leather prepared from the first embodiment reaches 184, and under the environment with more bacteria and mites, the antibacterial duration in the first embodiment is also longer than that of the cow leather prepared from other embodiments and common cow leather, and reaches 30 days.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A preparation method of fabric containing antibacterial cow leather is characterized by comprising the following steps: the method comprises the following steps:
(1) recovery of cow hide
Separating and recovering the regenerated cowhide, and using the recovered regenerated cowhide for manufacturing new leather;
(2) breaking by crushing
Crushing the recycled regenerated cowhide into particles, and preliminarily removing solid wastes and sediments on the surface of the cowhide;
(3) soaking in water
Placing a plurality of blocky regenerated cowhides in a soaking solution with the pH value of 10-11, 0.3% -0.5% of bactericide and 0.25% -0.35% of penetrating agent, rotating the blocky regenerated cowhides in the soaking solution for 4-8 hours, and discharging liquid;
(4) degreasing and water washing
Putting the soaked cowhide into a solution containing lipase, controlling the temperature at 40-50 ℃ and the pH value at 10-11, rotating the cowhide for 20-40 minutes, and discharging liquid;
(5) softening
Placing the cowhide obtained after degreasing and washing in an acid solution with the pH value of 4-5 for rotating the drum for 20-30 minutes, corroding the surface of the cowhide to change the pH value of the cowhide to 7, adding one or more of vegetable oil, animal oil and grease extraction products, continuing to rotate the drum for 20-30 minutes, and discharging liquid;
(6) tanning
Wetting softened cowhide with a small amount of water, adding antibacterial agent, mixing thoroughly, pressing into blocks, adding into tanning agent solution at a mass ratio of 15-25:1, rotating for 30-40 min, neutralizing, retanning, and drying for several times;
(7) leather printing
And (3) shaving, dyeing and screen printing the tanned leather according to the requirement.
2. The method for preparing the fabric containing the antibacterial cow leather according to claim 1, which is characterized in that: the area of the blocky regenerated cowhide in the step (2) is 500-2000cm2The size is suitable.
3. The method for preparing the fabric containing the antibacterial cow leather according to claim 1, which is characterized in that: the mass ratio of the soaking solution to the cowhide in the step (3) is 20-30:1, the substance for adjusting the pH value of the solution is one or more of sodium carbonate, sodium hydroxide or hydrated lime, and the penetrant is one or more of sodium alkyl benzene sulfonate, sodium alkyl sulfate, sodium secondary alkyl sulfonate, sodium secondary alkyl sulfate, sodium alkyl naphthalene sulfonate and sodium alkyl sulfosuccinate.
4. The method for preparing the fabric containing the antibacterial cow leather according to claim 1, which is characterized in that: the mass ratio of the solution to the cow leather in the step (4) is 20-30:1, and the substance for adjusting the pH value of the solution is one or more of sodium carbonate or sodium acetate.
5. The method for preparing the fabric containing the antibacterial cow leather according to claim 1, which is characterized in that: in the step (5), the mass ratio of the solution to the cowhide is 20-30:1, the substance for adjusting the pH value of the solution is one or more of acetic acid or oxalic acid, and the concentration of one or more of vegetable oil, animal oil and oil extraction products is 5% -10%.
6. The method for preparing the fabric containing the antibacterial cow leather according to claim 1, which is characterized in that: the tanning agent in the step (6) is one or more of basic chromium salt, basic aluminum salt and formaldehyde.
7. The method for preparing the fabric containing the antibacterial cow leather according to claim 1, which is characterized in that: the antibacterial agent in the step (6) is in solid particle shape.
8. The method for preparing the fabric containing the antibacterial cow leather according to claim 1, which is characterized in that: the thickness of the evenly shaved cattle leather in the step (7) is less than 2 mm, and the leather content in the cattle leather is 75%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111286305.XA CN113999944A (en) | 2021-11-02 | 2021-11-02 | Preparation method of fabric containing antibacterial cow leather |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111286305.XA CN113999944A (en) | 2021-11-02 | 2021-11-02 | Preparation method of fabric containing antibacterial cow leather |
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| CN113999944A true CN113999944A (en) | 2022-02-01 |
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| CN202111286305.XA Pending CN113999944A (en) | 2021-11-02 | 2021-11-02 | Preparation method of fabric containing antibacterial cow leather |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115449568A (en) * | 2022-09-16 | 2022-12-09 | 河南省科学院化学研究所有限公司 | Leather soaking agent and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112618A (en) * | 1994-05-23 | 1995-11-29 | 郑铁成 | Producing method for artificial leather |
| CN103045772A (en) * | 2012-12-25 | 2013-04-17 | 苏州铭晋纺织有限公司 | Processing technology for manufacturing leather by waste leather |
| CN107592886A (en) * | 2016-03-10 | 2018-01-16 | 株式会社阿克排乐宁 | Utilize the manufacture method of the regenerated bark corium of hide fiber |
-
2021
- 2021-11-02 CN CN202111286305.XA patent/CN113999944A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112618A (en) * | 1994-05-23 | 1995-11-29 | 郑铁成 | Producing method for artificial leather |
| CN103045772A (en) * | 2012-12-25 | 2013-04-17 | 苏州铭晋纺织有限公司 | Processing technology for manufacturing leather by waste leather |
| CN107592886A (en) * | 2016-03-10 | 2018-01-16 | 株式会社阿克排乐宁 | Utilize the manufacture method of the regenerated bark corium of hide fiber |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115449568A (en) * | 2022-09-16 | 2022-12-09 | 河南省科学院化学研究所有限公司 | Leather soaking agent and preparation method and application thereof |
| CN115449568B (en) * | 2022-09-16 | 2023-08-22 | 河南省科学院化学研究所有限公司 | Leather water-dipping agent and preparation method and application thereof |
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Application publication date: 20220201 |
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